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McGann, Bill; McGann, Carol. "1973 Giro di Lombardia results". Bike Race Info. Dog Ear Publishing. Archived from the original on 11 May 2015. Retrieved 10 July 2012.
"Merckx y Maertens se doparon" [Merckx and Maertens were doped] (PDF). El Mundo Deportivo (in Spanish). 9 May 1977. p. 52. Archived(PDF) from the original on 18 June 2015. Retrieved 21 April 2013.
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